A+ fortran user model exported to A+ dynamics

[lhblyl18]

Hello, I am trying to export an A+ flowsheet with fortran user model to A+ dynamics. The export is successful. But when I open the .dynf using A+ dynamics, errors come out. "Error at position 81: property blocks("membrane") does not exist in the flowsheet" "Error at position 81: commections can only be made between ports, multiposts or variables, blocks("membrane").in_f is not a port, multiport or variable."

I know A+ user model cannot be exported directly to A+ dyanmics, but I just don't know how to do?

It would be greatly appreciated if anyone can give any guidance.
thanks,